// (C) 2001 Ximian, Inc (http://www.ximian.com)
//
-using System.Reflection.Emit;
-using System.Reflection;
using System;
+using System.IO;
+using System.Text;
+using System.Reflection;
+using System.Collections;
+using System.Reflection.Emit;
+using System.Globalization;
-namespace CIR {
+namespace Mono.CSharp {
- interface ParameterData {
+ public interface ParameterData {
Type ParameterType (int pos);
+ Type [] Types { get; }
int Count { get; }
+ bool HasParams { get; }
+ string ParameterName (int pos);
+ string ParameterDesc (int pos);
+ Parameter.Modifier ParameterModifier (int pos);
+ string GetSignatureForError ();
}
public class ReflectionParameters : ParameterData {
ParameterInfo [] pi;
+ Type [] types;
+ int params_idx = -1;
+ bool is_varargs;
+ ParameterData gpd;
- public ReflectionParameters (ParameterInfo [] pi)
+ public ReflectionParameters (MethodBase mb)
{
+ ParameterInfo [] pi = mb.GetParameters ();
+ is_varargs = (mb.CallingConvention & CallingConventions.VarArgs) != 0;
+
this.pi = pi;
+ int count = pi.Length;
+
+ if (count == 0) {
+ types = Type.EmptyTypes;
+ return;
+ }
+
+ types = new Type [count];
+ for (int i = 0; i < count; i++)
+ types [i] = pi [i].ParameterType;
+
+ // TODO: This (if) should be done one level higher to correctly use
+ // out caching facilities.
+ MethodBase generic = TypeManager.DropGenericMethodArguments (mb);
+ if (generic != mb) {
+ gpd = TypeManager.GetParameterData (generic);
+ if (gpd.HasParams) {
+ for (int i = gpd.Count; i != 0; --i) {
+ if ((gpd.ParameterModifier (i-1) & Parameter.Modifier.PARAMS) != 0) {
+ this.params_idx = i-1;
+ break;
+ }
+ }
+ }
+ return;
+ }
+
+ //
+ // So far, the params attribute can be used in C# for the last
+ // and next to last method parameters.
+ // If some other language can place it anywhere we will
+ // have to analyze all parameters and not just last 2.
+ //
+ --count;
+ for (int i = count; i >= 0 && i > count - 2; --i) {
+ if (!pi [i].ParameterType.IsArray)
+ continue;
+
+ object [] attrs = pi [i].GetCustomAttributes (TypeManager.param_array_type, true);
+ if (attrs.Length == 1) {
+ params_idx = i;
+ return;
+ }
+ }
+ }
+
+ public override bool Equals (object obj)
+ {
+ ReflectionParameters rp = obj as ReflectionParameters;
+ if (rp == null)
+ return false;
+
+ if (Count != rp.Count)
+ return false;
+
+ for (int i = 0; i < Count; ++i) {
+ if (!types [i].Equals (rp.types [i]))
+ return false;
+ }
+ return true;
}
-
+
+ public override int GetHashCode ()
+ {
+ return base.GetHashCode ();
+ }
+
+ public string GetSignatureForError ()
+ {
+ StringBuilder sb = new StringBuilder ("(");
+ for (int i = 0; i < pi.Length; ++i) {
+ if (i != 0)
+ sb.Append (", ");
+ sb.Append (ParameterDesc (i));
+ }
+ if (is_varargs) {
+ if (pi.Length > 0)
+ sb.Append (", ");
+ sb.Append ("__arglist");
+ }
+ sb.Append (')');
+ return sb.ToString ();
+ }
+
public Type ParameterType (int pos)
{
+ if (is_varargs && pos >= pi.Length)
+ return TypeManager.runtime_argument_handle_type;
+
return pi [pos].ParameterType;
}
- public int Count {
- get {
- return pi.Length;
+ public string ParameterName (int pos)
+ {
+ if (gpd != null)
+ return gpd.ParameterName (pos);
+
+ if (is_varargs && pos >= pi.Length)
+ return "__arglist";
+
+ return pi [pos].Name;
+ }
+
+ public string ParameterDesc (int pos)
+ {
+ if (is_varargs && pos >= pi.Length)
+ return "";
+
+ StringBuilder sb = new StringBuilder ();
+
+ if (pi [pos].IsIn)
+ sb.Append ("in ");
+
+ Type partype = ParameterType (pos);
+ if (partype.IsByRef){
+ partype = TypeManager.GetElementType (partype);
+ if (pi [pos].IsOut)
+ sb.Append ("out ");
+ else
+ sb.Append ("ref ");
}
+
+ if (params_idx == pos)
+ sb.Append ("params ");
+
+ sb.Append (TypeManager.CSharpName (partype).Replace ("&", ""));
+
+ return sb.ToString ();
}
-
- }
- public class InternalParameters : ParameterData {
- Type [] pars;
-
- public InternalParameters (Type [] pars)
+ public Parameter.Modifier ParameterModifier (int pos)
{
- this.pars = pars;
+ if (pos == params_idx)
+ return Parameter.Modifier.PARAMS;
+ else if (is_varargs && pos >= pi.Length)
+ return Parameter.Modifier.ARGLIST;
+
+ if (gpd != null)
+ return gpd.ParameterModifier (pos);
+
+ Type t = pi [pos].ParameterType;
+ if (t.IsByRef){
+ if ((pi [pos].Attributes & (ParameterAttributes.Out|ParameterAttributes.In)) == ParameterAttributes.Out)
+ return Parameter.Modifier.OUT;
+ else
+ return Parameter.Modifier.REF;
+ }
+
+ return Parameter.Modifier.NONE;
}
public int Count {
- get {
- if (pars == null)
+ get { return is_varargs ? pi.Length + 1 : pi.Length; }
+ }
+
+ public bool HasParams {
+ get { return params_idx != -1; }
+ }
+
+ public Type[] Types {
+ get { return types; }
+ }
+ }
+
+#if GMCS_SOURCE
+ public class ReflectionConstraints : GenericConstraints
+ {
+ GenericParameterAttributes attrs;
+ Type base_type;
+ Type class_constraint;
+ Type[] iface_constraints;
+ string name;
+
+ public static GenericConstraints GetConstraints (Type t)
+ {
+ Type [] constraints = t.GetGenericParameterConstraints ();
+ GenericParameterAttributes attrs = t.GenericParameterAttributes;
+ if (constraints.Length == 0 && attrs == GenericParameterAttributes.None)
+ return null;
+ return new ReflectionConstraints (t.Name, constraints, attrs);
+ }
+
+ private ReflectionConstraints (string name, Type [] constraints, GenericParameterAttributes attrs)
+ {
+ this.name = name;
+ this.attrs = attrs;
+
+ if ((constraints.Length > 0) && !constraints [0].IsInterface) {
+ class_constraint = constraints [0];
+ iface_constraints = new Type [constraints.Length - 1];
+ Array.Copy (constraints, 1, iface_constraints, 0, constraints.Length - 1);
+ } else
+ iface_constraints = constraints;
+
+ if (HasValueTypeConstraint)
+ base_type = TypeManager.value_type;
+ else if (class_constraint != null)
+ base_type = class_constraint;
+ else
+ base_type = TypeManager.object_type;
+ }
+
+ public override string TypeParameter {
+ get { return name; }
+ }
+
+ public override GenericParameterAttributes Attributes {
+ get { return attrs; }
+ }
+
+ public override Type ClassConstraint {
+ get { return class_constraint; }
+ }
+
+ public override Type EffectiveBaseClass {
+ get { return base_type; }
+ }
+
+ public override Type[] InterfaceConstraints {
+ get { return iface_constraints; }
+ }
+ }
+#endif
+
+ class PtrHashtable : Hashtable {
+ sealed class PtrComparer : IComparer {
+ private PtrComparer () {}
+
+ public static PtrComparer Instance = new PtrComparer ();
+
+ public int Compare (object x, object y)
+ {
+ if (x == y)
return 0;
-
- return pars.Length;
+ else
+ return 1;
}
}
- public Type ParameterType (int pos)
+ public PtrHashtable ()
{
- if (pars == null)
- return null;
-
- return pars [pos];
+ comparer = PtrComparer.Instance;
+ }
+ }
+
+ /*
+ * Hashtable whose keys are character arrays with the same length
+ */
+ class CharArrayHashtable : Hashtable {
+ sealed class ArrComparer : IComparer {
+ private int len;
+
+ public ArrComparer (int len) {
+ this.len = len;
+ }
+
+ public int Compare (object x, object y)
+ {
+ char[] a = (char[])x;
+ char[] b = (char[])y;
+
+ for (int i = 0; i < len; ++i)
+ if (a [i] != b [i])
+ return 1;
+ return 0;
+ }
+ }
+
+ private int len;
+
+ protected override int GetHash (Object key)
+ {
+ char[] arr = (char[])key;
+ int h = 0;
+
+ for (int i = 0; i < len; ++i)
+ h = (h << 5) - h + arr [i];
+
+ return h;
+ }
+
+ public CharArrayHashtable (int len)
+ {
+ this.len = len;
+ comparer = new ArrComparer (len);
+ }
+ }
+
+ struct Pair {
+ public object First;
+ public object Second;
+
+ public Pair (object f, object s)
+ {
+ First = f;
+ Second = s;
+ }
+ }
+
+ /// <summary>
+ /// This is a wrapper around StreamReader which is seekable backwards
+ /// within a window of around 2048 chars.
+ /// </summary>
+ public class SeekableStreamReader
+ {
+ public SeekableStreamReader (StreamReader reader)
+ {
+ this.reader = reader;
+ this.buffer = new char [AverageReadLength * 3];
+
+ // Let the StreamWriter autodetect the encoder
+ reader.Peek ();
+ }
+
+ public SeekableStreamReader (Stream stream, Encoding encoding)
+ : this (new StreamReader (stream, encoding, true))
+ { }
+
+ StreamReader reader;
+
+ private const int AverageReadLength = 1024;
+
+ char[] buffer;
+ int buffer_start; // in chars
+ int char_count; // count buffer[] valid characters
+ int pos; // index into buffer[]
+
+ /// <remarks>
+ /// This value corresponds to the current position in a stream of characters.
+ /// The StreamReader hides its manipulation of the underlying byte stream and all
+ /// character set/decoding issues. Thus, we cannot use this position to guess at
+ /// the corresponding position in the underlying byte stream even though there is
+ /// a correlation between them.
+ /// </remarks>
+ public int Position {
+ get { return buffer_start + pos; }
+
+ set {
+ if (value < buffer_start || value > buffer_start + char_count)
+ throw new InternalErrorException ("can't seek that far back: " + (pos - value));
+ pos = value - buffer_start;
+ }
+ }
+
+ private bool ReadBuffer ()
+ {
+ int slack = buffer.Length - char_count;
+ if (slack <= AverageReadLength / 2) {
+ // shift the buffer to make room for AverageReadLength number of characters
+ int shift = AverageReadLength - slack;
+ Array.Copy (buffer, shift, buffer, 0, char_count - shift);
+ pos -= shift;
+ char_count -= shift;
+ buffer_start += shift;
+ slack += shift; // slack == AverageReadLength
+ }
+
+ int chars_read = reader.Read (buffer, char_count, slack);
+ char_count += chars_read;
+
+ return pos < char_count;
+ }
+
+ public int Peek ()
+ {
+ if ((pos >= char_count) && !ReadBuffer ())
+ return -1;
+
+ return buffer [pos];
+ }
+
+ public int Read ()
+ {
+ if ((pos >= char_count) && !ReadBuffer ())
+ return -1;
+
+ return buffer [pos++];
+ }
+ }
+
+ public class DoubleHash {
+ const int DEFAULT_INITIAL_BUCKETS = 100;
+
+ public DoubleHash () : this (DEFAULT_INITIAL_BUCKETS) {}
+
+ public DoubleHash (int size)
+ {
+ count = size;
+ buckets = new Entry [size];
+ }
+
+ int count;
+ Entry [] buckets;
+ int size = 0;
+
+ class Entry {
+ public object key1;
+ public object key2;
+ public int hash;
+ public object value;
+ public Entry next;
+
+ public Entry (object key1, object key2, int hash, object value, Entry next)
+ {
+ this.key1 = key1;
+ this.key2 = key2;
+ this.hash = hash;
+ this.next = next;
+ this.value = value;
+ }
+ }
+
+ public bool Lookup (object a, object b, out object res)
+ {
+ int h = (a.GetHashCode () ^ b.GetHashCode ()) & 0x7FFFFFFF;
+
+ for (Entry e = buckets [h % count]; e != null; e = e.next) {
+ if (e.hash == h && e.key1.Equals (a) && e.key2.Equals (b)) {
+ res = e.value;
+ return true;
+ }
+ }
+ res = null;
+ return false;
+ }
+
+ public void Insert (object a, object b, object value)
+ {
+ // Is it an existing one?
+
+ int h = (a.GetHashCode () ^ b.GetHashCode ()) & 0x7FFFFFFF;
+
+ for (Entry e = buckets [h % count]; e != null; e = e.next) {
+ if (e.hash == h && e.key1.Equals (a) && e.key2.Equals (b))
+ e.value = value;
+ }
+
+ int bucket = h % count;
+ buckets [bucket] = new Entry (a, b, h, value, buckets [bucket]);
+
+ // Grow whenever we double in size
+ if (size++ == count) {
+ count <<= 1;
+ count ++;
+
+ Entry [] newBuckets = new Entry [count];
+ foreach (Entry root in buckets) {
+ Entry e = root;
+ while (e != null) {
+ int newLoc = e.hash % count;
+ Entry n = e.next;
+ e.next = newBuckets [newLoc];
+ newBuckets [newLoc] = e;
+ e = n;
+ }
+ }
+
+ buckets = newBuckets;
+ }
}
}
}
projects / mono.git / blobdiff